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Coquandite

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Formula:
Sb
 
6+x
O
 
8+x
(SO
 
4
)(OH)
 
x
(H
 
2
O)
 
1- x
(x = 0.3)
Originally assumed to be (SbO)6(SO4)O2.H2O.
System:TriclinicHardness:3 - 4
This page provides mineralogical data about Coquandite.

Classification of Coquandite

IMA status:Approved 1991
Strunz 8th edition ID:6/B.02-20
Nickel-Strunz 10th (pending) edition ID:7.DE.35

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
E : With only medium-sized cations; unclassified
Dana 8th edition ID:30.1.18.1

30 : ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
1 : (AB)m(XO4)pZq, where m:p>2:1
Hey's CIM Ref.:25.8.2

25 : Sulphates
8 : Sulphates of Sb, V, Cr and U
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Type Occurrence of Coquandite

Co-type Localities:Pereta Mine, Pereta, Scansano, Grosseto Province, Tuscany, Italy
Lucky Knock Mine (Lawrence Mine), Whitestone Coulee, Tonasket, Okanogan Co., Washington, USA
Year of Discovery:1991

Physical Properties of Coquandite

Hardness (Mohs):3 - 4

Crystallography of Coquandite

Crystal System:Triclinic
Cell Parameters:a = 11.43Å, b = 29.77Å, c = 11.31Å
α = 91.07°, β = 119.24°, γ = 92.82°
Ratio:a:b:c = 0.384 : 1 : 0.38
Unit Cell Volume:V 3,350.00 ų (Calculated from Unit Cell)

Optical Data of Coquandite

Type:Biaxial (+)
Dispersion:r < v strong

Chemical Properties of Coquandite

Formula:
Sb
 
6+x
O
 
8+x
(SO
 
4
)(OH)
 
x
(H
 
2
O)
 
1- x
(x = 0.3)


Originally assumed to be (SbO)6(SO4)O2.H2O.
Simplified for copy/paste:Sb6+xO8+x(SO4)(OH)x(H2O)1- x (x = 0.3)
Essential elements:H, O, S, Sb
All elements listed in formula:H, O, S, Sb

Relationship of Coquandite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
7.DE.05Mangazeite
Al
 
2
(SO
 
4
)(OH)
 
4
· 3H
 
2
O
7.DE.10Carbonatecyanotrichite
Cu
 
4
Al
 
2
(CO
 
3
,SO
 
4
)(OH)
 
12
· 2H
 
2
O
7.DE.10Cyanotrichite
Cu
 
4
Al
 
2
(SO
 
4
)(OH)
 
12
· 2H
 
2
O
7.DE.10UKI-1975-(SO:AlCu)
(Cu, Al, SO
 
4
, H
 
2
O)
7.DE.15Schwertmannite
Fe
3+
16
(OH,SO
 
4
)
 
12-13
O
 
16
· 10-12H
 
2
O
7.DE.20Tlalocite
Cu
 
10
Zn
 
6
(Te
6+
 
O
 
4
)
 
2
(Te
4+
 
O
 
3
)(OH)
 
25
Cl · 27H
 
2
O
7.DE.25Utahite
Cu
 
5
Zn
 
3
(TeO
 
4
)
 
4
(OH)
 
8
· 7H
 
2
O
7.DE.40Osakaite
Zn
 
4
(SO
 
4
)(OH)
 
6
· 5H
 
2
O
7.DE.45Wilcoxite
MgAl(SO
 
4
)
 
2
F · 17H
 
2
O
7.DE.50Stanleyite
(V
4+
 
O)(SO
 
4
) · 6H
 
2
O
7.DE.55Mcalpineite
Cu
 
3
(Te
6+
 
O
 
6
) · H
 
2
O
7.DE.60Hydrobasaluminite
Al
 
4
(SO
 
4
)(OH)
 
10
· 12-36H
 
2
O
7.DE.62Volaschioite
Fe
 
4
(SO
 
4
)O
 
2
(OH)
 
6
· 2H
 
2
O
7.DE.65Zaherite
Al
 
12
(SO
 
4
)
 
5
(OH)
 
26
· 20H
 
2
O
7.DE.70Lautenthalite
PbCu
 
4
(SO
 
4
)
 
2
(OH)
 
6
· 3H
 
2
O
7.DE.75Camerolaite
Cu
 
4
Al
 
2
(HSbO
 
4
,SO
 
4
)(CO
 
3
)(OH)
 
10
· 2H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
25.8.1Klebelsbergite
(SbO)
 
4
(SO
 
4
)(OH)
 
2
25.8.3Peretaite
Ca(SbO)
 
4
(SO
 
4
)
 
2
(OH)
 
2
· 2H
 
2
O
25.8.4Cannonite
Bi
 
2
(SO
 
4
)O(OH)
 
2
25.8.5Minasragrite
(V
4+
 
O)(SO
 
4
) · 5H
 
2
O
25.8.6Stanleyite
(V
4+
 
O)(SO
 
4
) · 6H
 
2
O
25.8.7Redingtonite
(Fe
2+
 
,Mg,Ni)(Cr,Al)
 
2
(SO
 
4
)
 
4
·22H
 
2
O
25.8.8Metauranopilite
(UO
 
2
)
 
6
(SO
 
4
)(OH)
 
10
· 5H
 
2
O
25.8.9Uranopilite
(UO
 
2
)
 
6
(SO
 
4
)O
 
2
(OH)
 
6
· 14H
 
2
O
25.8.10Natrozippeite
Na
 
5
(UO
 
2
)
 
8
(SO
 
4
)
 
4
O
 
5
(OH)
 
3
· 12H
 
2
O
25.8.11Zippeite
K
 
3
(UO
 
2
)
 
4
(SO
 
4
)
 
2
O
 
3
(OH) · 3H
 
2
O
25.8.12Johannite
Cu(UO
 
2
)
 
2
(SO
 
4
)
 
2
(OH)
 
2
· 8H
 
2
O
25.8.13Magnesiozippeite
Mg(UO
 
2
)
 
2
(SO
 
4
)O
 
2
· 3.5H
 
2
O
25.8.14Zinczippeite
Zn(UO
 
2
)
 
2
(SO
 
4
)O
 
2
· 3.5H
 
2
O

Other Names for Coquandite

Synonyms:
IMA1991-024
Other Languages:
German:Coquandit
Spanish:Coquandita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Coquandite

Reference List:

- +
New Minerals (1997), New Minerals 1990-1994.

Mineralogical Magazine: 56: 599-603.

Bindi, L., Biagioni, C., Ceccantini, L., Batoni, M. & Menchetti, S. (2014): Coquandite, Sb6+xO8+x(SO4)(OH)x(H2O)1-x (x = 0.3) from the Cetine mine, Tuscany, Italy: crystal structure and revision of the chemical formula. Mineralogical Magazine (in press).

Internet Links for Coquandite

Search Engines:
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  • External Links:
  • Look for Coquandite on Webmineral
  • Look for Coquandite on Athena Mineralogy
  • Look for Coquandite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Coquandite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
  • Buy from McDougall Minerals
  • Find Coquandite on www.crystalclassics.co.uk
  • Fine Minerals from Weinrich Minerals, Inc.
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  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Top quality minerals from Kristalle of California
  • Buy from Dave Bunk Minerals
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  • SpiriferMinerals.com - high quality low prices
  • Search for Coquandite on Well-Arranged Molecules
  • Localities for Coquandite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Italy
     
    • Tuscany
      • Grosseto Province
        • Scansano
          • Pereta
    Min.Mag.:56:599-603.
      • Pisa Province
        • Pomarance
    Orlandi, P. (1997): Zibaldone di mineralogia italiana. Rivista Mineralogica Italiana, 21, 179-185. ; Bardi, T., Biagioni, C., & Orlandi, P. (2009). Aggiornamento sui minerali della Sorgente Solfurea di Micciano (Pomarance, Pisa, Toscana). MICRO (località), 1/2009, 261-276.
      • Siena Province
        • Chiusdino
    Lapis Magazine Vol 6.1993 Page 22
    Japan
     
    • Shikoku Island
      • Ehime Prefecture
        • Saijo City
    specimens seen at Kyoto show, 2010
    Luxembourg
     
    • Goesdorf commune
      • Goesdorf
    Simon Philippo analysis (to be published); [Filella M., Philippo S., Belzile N., Chen Y. and Quentel F. (2009) Natural attenuation processes applying to antimony: A study in the abandoned antimony mine in Goesdorf, Luxembourg - Science of the total environment (in press)]
    Portugal
     
    • Porto District
      • Gondomar
        • Medas
    Romania
     
    • Maramureș Co.
    Gabor Koller specimens
    USA
     
    • Washington
      • Okanogan Co.
        • Tonasket
          • Whitestone Coulee
    Min.Mag.: 56:599-603.
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    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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